Month: April 2012
The brain receives 15% from the cardiac debit in rest and answers for 20% of the total of the corporal consumption of oxygen even so answers for apenas1 a2% of the corporal weight. The sanguineous flow in the brain is normally about 50ml per minute for each 100g of fabric, having regional variations between substances white and cinereous and between different parts of it substantiates gray, this sanguineous flow if it keeps constant in an ample gamma of sanguineous pressures and intracraniana pressure, due to auto-regulation of the vascular resistance. For Kumar; Abbas and Fausto (2205, p.1425) brain is classified as ‘ ‘ …
one weaveeed highly aerbico, with oxygen instead of metabolic substratum serving as substance limitante’ ‘. One knows that the oxygen, substantiates essential for the functioning of the cells that composes the brain, for times can arrive at the fabric cerebral in inefficacious way or even though not to arrive at fabric for any one of some mechanisms: … hipxia functionary in a scene of low partial pressure of oxygen (pO2), comprometimento of the capacity of carry of oxygen for the blood, or inhibition of the use of oxygen for the fabric; or isquemia, transitory or permanent, after the interruption of the normal circulatrio flow.
Source: (2008) Figure 2. Lumbricoides eggs of Ascaris: – Fertile egg (mamilonada external Membrane, average and internal). B infertile Egg (Prolongated, thinner mamilonada membrane and granular cytoplasm). Source: (2010). 2.HBITAT In moderate infections, the adult worms are found in the thin intestine, mainly in jejuno and leo, but, in intense infections, these can occupy all the extension of the thin intestine. Males and females live together.
They can be imprisoned to the mucosa, with aid of the lips or migrarem for the intestinal light (SNOWS, 2005). 2.1.Ciclo Biological the biological cycle of the Ascaris lumbricoides (Figure 3) is of the monoxnico type, that is, they possess an only host. Each fecundada female is capable to place, per day, about 200 a thousand no-embrionados eggs, that arrive together at the environment with excrements. In favorable conditions, as humidity, oxygenation and adjusted temperature, these eggs become embrionados in 15 days. It has multiplication of the germinati-vain cells, forming the first larva (L1). To follow rabditide occurs the evolution for larva (L2), and after that for larva filariide L3 (REY, 2001). The transmission if of the one for the egg ingestion I contend L3 together with water and foods (PITTNER et al., 2007). In the stomach, the rind if breaches and the larva goes for the intestine and migra for ceco.
It penetrates in the intestinal wall, it falls in the circulation, it goes for the liver, heart, and lung. In the pulmonary capillaries it suffers metamorphosis, of L3 for L4. L4 breaches the capillaries and falls in the alveoli, suffering another metamorphosis and if transforming into L5, of 1,5 mm. L5 then the brnquica tree goes up and can together with be eliminated catarro or be engolida and to go for the stomach. Later it goes for the intestine and in the jejuno-leo if it transforms into young adults. With 60 days they reach the sexual maturity, becoming adult.